Four-stroke diesel radial engine
| A-1020 / T-1020
|
|
| A T-1020 variant on display
|
| Type
|
Diesel radial engine
|
| National origin
|
United States
|
| Manufacturer
|
Guiberson Diesel Engine Company
|
| Designer
|
Fred A. Thaheld[1]
|
| First run
|
January 1940[2]
|
| Major applications
|
Stinson Reliant
|
The Guiberson A-1020 is a four-stroke diesel radial engine developed for use in aircraft and tanks.
Design and development
Development of the Guiberson diesel engine started in the 1930s with the A-918 and A-980 which was first flown in 1931. It is a single-row direct drive nine-cylinder four-cycle engine.[2]
Operational history
Production A-1020s and T-1020s were designed and sold by Guiberson and produced by Buda Engine Co.[2][3]
Specifications (A-1020)
Data from Aircraft Diesels: Chapter 3 - The Guiberson Diesel[2][5]
General characteristics
- Type: 9-cylinder air-cooled radial diesel piston engine
- Bore: 5.125 in (130.18 mm)
- Stroke: 5.5 in (139.70 mm)
- Displacement: 1,021 cu in (16.73 L)
- Length: 38.6 in (980 mm) including starter
- Diameter: 47.125 in (1,197.0 mm)
- Dry weight: 653 lb (296 kg)
- Designer: F. A. Thaheld
Components
- Valvetrain: two pushrod operated valves per cylinder, with de-compression device for hand-turning or free-wheeling.
- Fuel system: Guiberson system fuel injection
- Fuel type: Diesel Index No.50
- Cooling system: Air-cooled
- Reduction gear: Direct-drive
- Eclipse inertia starter or Coffman cartridge starter
Performance
- Power output: 310 hp (230 kW), continuous at 2,150 rpm at sea level
- Compression ratio: 15:1
- Specific fuel consumption: 0.42 lb/(hp⋅h) (0.26 kg/kWh) at 2,150 rpm; 0.382 lb/(hp⋅h) (0.232 kg/kWh) at cruising speed
- Oil consumption: 0.02 lb/(hp⋅h) (0.012 kg/kWh) at 2,150 rpm
- Power-to-weight ratio: 0.475 hp/lb (0.781 kW/kg)
- BMEP 113 psi (780 kPa) at rated output
